| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* |
| * |
| * (C) COPYRIGHT 2019-2021 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the |
| * GNU General Public License version 2 as published by the Free Software |
| * Foundation, and any use by you of this program is subject to the terms |
| * of such GNU license. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| * |
| */ |
| |
| #ifndef _PROTECTED_MEMORY_ALLOCATOR_H_ |
| #define _PROTECTED_MEMORY_ALLOCATOR_H_ |
| |
| #include <linux/mm.h> |
| |
| /** |
| * struct protected_memory_allocation - Protected memory allocation |
| * |
| * @pa: Physical address of the protected memory allocation. |
| * @order: Size of memory allocation in pages, as a base-2 logarithm. |
| */ |
| struct protected_memory_allocation { |
| phys_addr_t pa; |
| unsigned int order; |
| }; |
| |
| struct protected_memory_allocator_device; |
| |
| /** |
| * struct protected_memory_allocator_ops - Callbacks for protected memory |
| * allocator operations |
| * |
| * @pma_alloc_page: Callback to allocate protected memory |
| * @pma_get_phys_addr: Callback to get the physical address of an allocation |
| * @pma_free_page: Callback to free protected memory |
| */ |
| struct protected_memory_allocator_ops { |
| /* |
| * pma_alloc_page - Allocate protected memory pages |
| * |
| * @pma_dev: The protected memory allocator the request is being made |
| * through. |
| * @order: How many pages to allocate, as a base-2 logarithm. |
| * |
| * Return: Pointer to allocated memory, or NULL if allocation failed. |
| */ |
| struct protected_memory_allocation *(*pma_alloc_page)( |
| struct protected_memory_allocator_device *pma_dev, |
| unsigned int order); |
| |
| /* |
| * pma_get_phys_addr - Get the physical address of the protected memory |
| * allocation |
| * |
| * @pma_dev: The protected memory allocator the request is being made |
| * through. |
| * @pma: The protected memory allocation whose physical address |
| * shall be retrieved |
| * |
| * Return: The physical address of the given allocation. |
| */ |
| phys_addr_t (*pma_get_phys_addr)( |
| struct protected_memory_allocator_device *pma_dev, |
| struct protected_memory_allocation *pma); |
| |
| /* |
| * pma_free_page - Free a page of memory |
| * |
| * @pma_dev: The protected memory allocator the request is being made |
| * through. |
| * @pma: The protected memory allocation to free. |
| */ |
| void (*pma_free_page)( |
| struct protected_memory_allocator_device *pma_dev, |
| struct protected_memory_allocation *pma); |
| }; |
| |
| /** |
| * struct protected_memory_allocator_device - Device structure for protected |
| * memory allocator |
| * |
| * @ops: Callbacks associated with this device |
| * @owner: Pointer to the module owner |
| * |
| * In order for a system integrator to provide custom behaviors for protected |
| * memory operations performed by the kbase module (controller driver), |
| * they shall provide a platform-specific driver module which implements |
| * this interface. |
| * |
| * This structure should be registered with the platform device using |
| * platform_set_drvdata(). |
| */ |
| struct protected_memory_allocator_device { |
| struct protected_memory_allocator_ops ops; |
| struct module *owner; |
| }; |
| |
| #endif /* _PROTECTED_MEMORY_ALLOCATOR_H_ */ |